#Login{
    position:fixed;
    top:10%;
    left:30%;
    width:500px;
    height:200px;
    padding:20px;
    background-color:gainsboro;
    border:1px solid black;
}

.user,.key{
    display:block;
    margin-left:100px;
    margin-top: 20px;
}

#password{
    margin-left: 15px;
}

#Login button{
    display:block;
    margin-top:20px;
    margin-left:200px;
}